/*
 * Copyright (c) 2002-2020 Manorrock.com. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *   3. Neither the name of the copyright holder nor the names of its
 *      contributors may be used to endorse or promote products derived from
 *      this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package cloud.piranha.webapp.impl;

import cloud.piranha.webapp.api.WelcomeFileManager;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;

/**
 * The default WelcomeFileManager.
 *
 * @author Manfred Riem (mriem@manorrock.com)
 */
public class DefaultWelcomeFileManager implements WelcomeFileManager {

    /**
     * Stores the remove defaults flag.
     */
    private boolean removeDefaults;

    /**
     * Stores the welcome file list.
     */
    private final ArrayList<String> welcomeFileList;

    /**
     * Constructor.
     */
    public DefaultWelcomeFileManager() {
        removeDefaults = true;
        welcomeFileList = new ArrayList<>();
        welcomeFileList.add("index.jsp");
        welcomeFileList.add("index.html");
        welcomeFileList.add("index.htm");
    }

    @Override
    public void addWelcomeFile(String welcomeFile) {
        /*
         * Upon the first welcome-file added the default list is deleted.
         */
        if (removeDefaults) {
            welcomeFileList.clear();
            removeDefaults = false;
        }
        welcomeFileList.add(welcomeFile);
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, 
            FilterChain chain) throws IOException, ServletException {
        chain.doFilter(request, response);
    }
    
    @Override
    public List<String> getWelcomeFileList() {
        return welcomeFileList;
    }
}
